A few years ago I bought a Quattro 48/3000/35 in hopes of one day putting together a small off-grid system for a small metal garage/guesthouse. Well, I recently ended up purchasing a 4800w system that needs an inverter/charger, and I'm wondering if the Quattro 48/3000/35 would be sufficient assuming we occasionally run the load at full capacity (which is not likely to ever happen). Would it be better to add a second unit or even upgrade to a larger unit?